Sash-balance



2 Sheets-Sheet 1. I

Patented June 10,1884.

| I 1 [1 ii SASH BALANGE.

i i Q 5 N 1 i x 1 (ModeL) J. B. MONTAGUE, J. T. BOOKER & E. O. DINNING.

(Model.)" 2 Sheets-Sheet 2. J. B. MONTAGUILJ. T. BOOKER & B. O. DINNING. SASH} BALANOE.

Y I r S. A ,w 8 W m m V A 0. M

u. v d v 6 t n e P /VESSEs JOHN BARTLETT MON TAGUE, JAMES ATENT FFICE.

THOMAS BOOKER, AND ENOOH CASS DINNING, or FRANKLIN, KENTUCKY.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 300,104, dated June 10,1884.

Application filed July 13, 1883.

To ctZZ whom it may concern:

Be it known that we, JOHN B. MONTAGUE, JAMES '1. BOOKER, and ENooH O. DINNING, of Franklin, in the county of Simpson and State of Kentucky, have invented certain Improvements in Suspending Window-Sashes, of which the following is a specification.

Our invention consists in a novel manner of applying suspending-springs or elastic cords to window-sashes,and in combining with asash so suspended an automatic locking device to hold the sash against the elevating tendency of the springs.

In the drawings hereto annexed, Figure 1 represents a face view, partly in section, of a window provided with our improvements; Fig. 2, a vertical section of the same on the line as m, Fig; 1; Figs. 3 and 4, enlarged views of the locking device, which is especially designed for sash hung as herein explained and Fig. 5, a view of the spring as used for heavy sash.

Window-sashes have hitherto been balanced by weights attached to cords running over pulleys, arranged to slide unbalanced in the window-frame, and held at any desired elevation by catches or looking devices,or suspended by springs, which serve to elevate the sashframes when the latter are not locked against such elevation.

Our invention relates to the last-mentioned plan, which is preferred because of its cheapness and simplicity, and the facility with which it may be applied to unbalanced windows of old houses, as well as to new buildings; and the improvements consist, first, in boring the stiles of the sash-frames vertically, so that the springs may pass through or within them, and thence directly up to an eye or fastening vertically above the opening, thus causing the springs to act in true vertical planes, without tendency to draw sidewisc, and without chafing or rubbing of the springs or cords. Another and very important advantage of our plan is that it leaves the edge or side face of the stiles without grooves, cavities, or recesses of any kind, thus providing a suitable surface for a frictional locking device to act upon.

(Modeld Referring again to the drawings, A represents a window-frame, and B C, respectively, the upper and lower'sash mounted therein,and arranged to slide up and down, as usual. Each sash is suspended by one or more spiral springs or elastic cords, D, two being indicated in the drawings for each sashone at each side. It is, 5 however, obvious that a single spring may be used, and that this may be arranged at the middle of the window,such arrangement being convenient where the sash is made with a middle bar. For heavy sashes three such springs may be used-one at the middle and one at each side.

In order to afford room for the springs when the sash is raised, to insure a straight pull or action and to avoid chafing of the springs, the stiles are bored from the top downward a suitable distance, usually one-half or more of the length of the stile,preferably the whole length.

The springs are secured at their upper ends to the frame A. by eyes a or other small fastenings, and their lower ends are secured in a similar manner at or near the bottoms of the holes b, bored in the stiles,as above mentioned.

In Fig. 2 we have represented one sash as suspended by spiral springs and the other by 7 elastic cords, which we consider the equiva lents of each other. TV hen additional strength is wanted, together with great elasticity, the wire or coiled spring and the elastic cord may be combined, as shown in Fig. 5, the latter being passed centrally through the former, or applied in any other convenient manner. It will be seen that both the upper and lower sash are suspended and operate in the same mannerthat is to say, both suspended by springs.

To prevent the sash from being jarred sufficiently to break the glass in case of being allowed to ascend suddenly, under the contraction of the spring, a buffer, 0, may be let into 0 or applied to the sash, as shown in Figs. 1 and 2, or applied in like manner to the top of the frame.

For the purpose of retaining the sash at any desired height we provide for each a gravitating locking dog or pawl, (1, preferably of the than the spindle, and advisably curved or shape represented, and applied to a spindle, c, which extends to the outer face of the frame A, and is there "furnished with a knob, f, by which to turn the spindle, which latter is supported at its inner end by a metal plate, 9, and at the front of the sash by a rosette, h, preferably of the form patented by Montague and Booker, August 28, 1881, and numbered 245,969.

It will be noticed that under the peculiar arrangement or mode of hanging the sash herein described it is necessary that the pawl or fastening be arranged to lock the sash against upward instead of downward movement, and to do so with the sash at any elevation. WVe therefore make the pawl of the form shown that is to say, with an enlarged outer end, which serves as a weight to throw the lighter inner end against the sash and to hold it in contact therewith, and with an inner end somewhat longer than the distance from the spindle to the sash, and having its end lower made slightly eccentric. Being constantly pressed against the sash, and having a natural tendency to swing upward, the lighter end of the pawl engages with and firmly holds the sash as soon as the latter begins to ascend, and will continue thus to retain it until released by turning the spindle. hen the sash is at its highest point, the pawl may be reversed or turned over or made to lock the sash in its elevated position, thus preventing the upper sash from being lowered from the outside, and relieving the springs of the lower sash of the latters weight when raised. 7

It will be seen from the'foregoing that it is impossible to move either sash from the outside when both are closed.

Vhile we prefer the abovedeseribed pawl, it isapparent that any other suitable locking device designed and arranged to automatically lock the sash against upward movement, and at any height-as, for instance, an anchorshaped pawlmay be used in place thereof; and hence we do not limit ourselves to its use.

The springs may, if desired, be placed in holes running up into the frame; but the plan shown is preferred.

Having thus described our invention, what we claim is- In combination with a sash-frame, a sash having its stiles bored with vertical holes, suspending-springs attached at the upper ends to the upper part of the sash-frame, extending into said vertical holes and secured at their lower ends therein, and a frictional locking device, substantial] y such as shown, hear ing against the edge of the stile and serving to hold the sash against the force of the spring.

JOHN BARTLETT MONTAGUE. JAMES THOMAS BOOKER. ENOOH CASS DINNING. \Vitncsses:

SAML. N. FORLINE, E. S. XTINEYARD, 

